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In this paper, a novel multiscale speckle suppression method is proposed for ultrasonic images. An original image is transformed into a multiscale curvelet domain and the thresholding estimators are derived for processing the curvelet coefficients of detail subbands by successively combining the SURE-LET approach with the neighboring windows. In order to reduce the curvelet-like artifacts, the shrinkage...
A novel ultrasonic flow velocity estimation method employing the two-dimensional (2-D) frequency shift track is proposed. By representing the backscattered echoes from human blood in the 2-D frequency domain, this paper shows that the velocity profile measurement using pulsed-wave Doppler ultrasound and the moving target track in image processing are isomorphic problems. Therefore, feature template...
As a novel multi-scale analytical technique, curvelet transform is developed to propose a better sparse representation of images with singularities along curves. Speckle noise is a natural property in medical ultrasound images, which often result in blurred image features. Therefore, speckle noise reduction is a significant and delicate research subject in medical images processing. In this paper,...
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